Critical surface of the SU(3)LxSU(3)R chiral quark model at nonzero baryon density

The boundary of the first order chiral phase transition region is studied in the mπ-mK-μB space using the one-loop optimized perturbation theory for the resummation of the perturbative series. Chiral perturbation theory for mesons and baryons is used for the T=0 parametrization of the model. The surface of second order transition points bends with increasing μB towards the physical point of the mπ-mK mass plane allowing for the existence of the critical end point in the μB-T plane at the physical point. The location and scaling region of the CEP is explored